0cb8d8513c
The --enable-sim-hostendian flag was purely so people had an escape route for when cross-compiling. This is because historically, AC_C_BIGENDIAN did not work in those cases. That was fixed a while ago though, so we can require that macro everywhere now and simplify a good bit of code.
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/* The common simulator framework for GDB, the GNU Debugger.
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Copyright 2002-2016 Free Software Foundation, Inc.
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Contributed by Andrew Cagney and Red Hat.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef _SIM_ENDIAN_C_
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#define _SIM_ENDIAN_C_
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#include "sim-basics.h"
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#include "sim-assert.h"
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#if !defined(_SWAP_1)
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#define _SWAP_1(SET,RAW) SET (RAW)
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#endif
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#if !defined(_SWAP_2) && (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE) && defined(htons)
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#define _SWAP_2(SET,RAW) SET htons (RAW)
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#endif
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#ifndef _SWAP_2
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#define _SWAP_2(SET,RAW) SET (((RAW) >> 8) | ((RAW) << 8))
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#endif
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#if !defined(_SWAP_4) && (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE) && defined(htonl)
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#define _SWAP_4(SET,RAW) SET htonl (RAW)
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#endif
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#ifndef _SWAP_4
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#define _SWAP_4(SET,RAW) SET (((RAW) << 24) | (((RAW) & 0xff00) << 8) | (((RAW) & 0xff0000) >> 8) | ((RAW) >> 24))
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#endif
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#ifndef _SWAP_8
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#define _SWAP_8(SET,RAW) \
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union { unsigned_8 dword; unsigned_4 words[2]; } in, out; \
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in.dword = RAW; \
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_SWAP_4 (out.words[0] =, in.words[1]); \
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_SWAP_4 (out.words[1] =, in.words[0]); \
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SET out.dword;
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#endif
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#ifndef _SWAP_16
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#define _SWAP_16(SET,RAW) \
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union { unsigned_16 word; unsigned_4 words[4]; } in, out; \
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in.word = (RAW); \
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_SWAP_4 (out.words[0] =, in.words[3]); \
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_SWAP_4 (out.words[1] =, in.words[2]); \
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_SWAP_4 (out.words[2] =, in.words[1]); \
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_SWAP_4 (out.words[3] =, in.words[0]); \
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SET out.word;
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#endif
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#define N 1
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#include "sim-n-endian.h"
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#undef N
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#define N 2
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#include "sim-n-endian.h"
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#undef N
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#define N 4
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#include "sim-n-endian.h"
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#undef N
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#define N 8
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#include "sim-n-endian.h"
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#undef N
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#define N 16
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#include "sim-n-endian.h"
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#undef N
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INLINE_SIM_ENDIAN\
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(unsigned_8)
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sim_endian_split_16 (unsigned_16 word, int w)
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{
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if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
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{
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return word.a[1 - w];
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}
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else
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{
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return word.a[w];
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}
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}
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INLINE_SIM_ENDIAN\
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(unsigned_16)
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sim_endian_join_16 (unsigned_8 h, unsigned_8 l)
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{
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unsigned_16 word;
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if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
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{
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word.a[0] = l;
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word.a[1] = h;
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}
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else
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{
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word.a[0] = h;
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word.a[1] = l;
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}
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return word;
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}
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#endif /* _SIM_ENDIAN_C_ */
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